anybody know where i can get a replacement PCB for it?

You should contact Roland I think, just call 'em. What happened?

(Not sure what a PCB is).

I'm not really sure. I don't own it but I'm interested in buying a used one that has a "cracked pcb" apparently. I have a functioning one so I might just take the chance and try to restore the broken one. but definately good idea in calling roland. hopefully they still have some parts in stock since its discontinued and all. thanks

printed circuit board

basically the guts of the 303

Oh I see. Well, sounds like a rather risky choice then. Better ask Roland first if they can fix it before buying it.

I think you might be out of luck there tho, as indeed the 303 was discontinued a long time ago.